Bed-motion for printing-presses.



K. HDDGMAN & B. HALL. BED MOTION FOR PRINTING PRESSES. APPLICATION 311.21) 001218.1906.

91 1 ,498. Patented Feb. 2, 1909. 3 SHEETS-SHEET 1.

witnesses $126 %5; 2:21:01; M aywzm W a MMJM flzr s.

W. K. HODGMAN & B. HALL. BED MOTION FOR PRINTING PRESSES.

APPLICATION FILED 00118, 1906.

91 1,498. Patented Feb. 2, 1909.

3 SHEETS-SHEET 2.

Intel/1213f witnesses 1; @JZKL W a. w flrm. y

Kiw M fiai y W.K.HODGMAN &B.HALL

BED MOTION FOR PRINTING PRESSES.

APPLICATION FILED 0011.8,1906.

Patented Feb. 2, 1909.

3 SHEETS-SHEET 3.

wifnesses 14 W UNITED STATES PATENT OFFICE.

WILLIS K. HODGMKN A'ND BICKNELL HALL, OF TAUNTON, MASSACHUSETTS, ASSIGNORS TO HUBER-HODGMAN PRINTING PRESS COMPANY, OF TAUNTON, MASSACHUSETTS, A COR- PORATION OF MASSACHUSETTS.

BED-MOTION FOR PRINTING-PRESSE S.

Specification of Letters Patent.

Patented Feb. 2, 1909.

Application filed October 18, 1906. Serial N 0. 339,480.

5 county of'Bristol and State of Massachusetts,

have invented an Improuement in Bed-Motions for Printing-Presses, of which the following'description, in connection with the accompanying drawings, is' a specification, like letters on the drawings representing like arts.

p This invention relates to mechanism for converting rotary motion into rectilineally reciprocating motion,and is particularly de signed for use in connection with the red rocatin' beds of printinq presses, thong it may e applied and use in any location and for any purpose for which the same is adapted.

'tion may be fully apparent, we have herein disclosed for illustrative purposes one type or embodiment of the invention in the accompanying drawings, it being understood that the invention may be carried out by other embodiments thereof and by mechanism widely differing from that herein selected for illustration. I i I Havin reference to that ty e of the invention erein illustrated in t e drawings: Figure 1 is a side elevation, with the base artly in section, of a single impression c llnder and a bed plate cooperating therewith and operated in accordance with our invention. Fi 2 is mainly a plan view of the parts em odying our 1nvention beneaththe upper rack of the bed-plate, the bearings, portions of the framing and the bed reversing rack being shown in section, and, Fig. 3 is a vertical section upon the line 3-3 of Fig. 1 of the typeof operating mechanism herein selected for illustration, the reversing shaft being indicated in elevation and the impression cylinder and driving gear carried thereby being diagrannnatically indicated.

Having. reference to that ty e or embodiment of the invention herein c iosen for the illustration, the bed of the printing-press is indicated at 1, such bed being constructed in .any suitable manner and operatively connected to mechanism to cause the continuously and uniformly running driving shaft,

first, to propel the bed continuously and also to provide for t 'Inorder that the principles of the invenworking st r at uniform speed in one direction, and then to propel the bed continuously and at uniform speed in the o posite direct-ion, and

he reversal movement of the bed at the 'end of its continuous and uniform movement in one direction, by

gradually slowing down said movement until the bed is brought torest, and then gradually accelerating its movement in the opposite direction until it acquires the speed-of its uniform stroke.

In the usual operation of a printing-press of the bed and cylinder type, the printing bed carrying the printing surface is reciprocated. in the manner above stated, the pcrip'h'ery of the cylinder and paper thereon traveling in the printing operation at the same surfacespeed as the printing surface on the bed,.so that the paper is pressed against the printing surface with a rolling action and without any slip of one surface relative to the other along the line of contact between the cylinder and printing surface. In this-type of press the impression is commonly taken only in the travel of the bed in one direction under the cylinder, which continues to run in the same direction all the time that the press is in operation, and after the bed has made its forward and working' movement or stroke under the'cylinder the bed must be returned past the cylinder to the starting point preparatory for another 0 re. In t e return movement of the d the cylinder is commonly raised a little, so that its surface is entirely above and clear of the printing surface on the bed, which is now traveling in an o ")POSltE direction to the surface of the cylinder, which thus makes an idle revolution during the return or non-working stroke of the bed Generally speaking, the mechanism for driving the bed of such type of printing presses comprises a continuously rotating toothed gear and two racks connected with the printing bed so as to be positioned adjacent opposite edges of the gear, and means to cause engagement of one of the racks with said gear. to produce the principal part of a stroke in one direction, and to cause the engagement of the other rack with the gear, to produce the principal part of the stroke in.the other direction, the bed commonly running at uniform speed throughout the part of its stroke eifected by the rack and gm r, this being the same as the surtace speed of the cylinder during the stroke.

When the bed arrives at the end of such rack and gear movement, it cinncs under the control ol another mart. of the bed motion, which may be termed the reversing mechanism, and which acts to bring the bed to a stop at the end of a short movement beyond the rack traveling movement, and to start the bed in the revcr-e direction and bring it to the velocity of the rack driven movement by the time that the second rack arrives at and comes into engagen'icnt with the gear, at which time the reversing mechanism gives up cmtrol and the bed is again driven by the rack and gear movement to the point near the other end of its stroke, where the rewrsing mechanism again takes control and periornis a similar reversal of the movement. of the bed to that just described. That is to say, the reversing mechanism is designed to take the bed at full working speed, reduce its velocity by gradual dimination, uni i1 it is stopped and then move it in the opposite direction with a gradual acceleration until it is brought up to full working velocity in said o3posite direction.

In such type of mechanism the gear and the racks may bc relatively shifted in many ditl'ei'cnt ways, among which may be enumerated the following: The racks may be opposed in the, same vertical plane and the gear may be shifted vertica ly to engage the racks in alter-nation, or the racks may he oppo ed in diflerent vertical planes and the gear be shifted laterally from engagement with one rack to engagement with the other, or the relative movement may be accomplished by maintaining the gear stationary and bringing the racks alternately into engagement therewith by vertical or lateral movement. The racks and gear may be otherwise opposed or arranged to accomplish the same result.

Our invention is applicable to a gear and rack mechanism wherein the relative movement of said gear and racks is accomplished in any of the above indicated ways or in any other desired manner. Although that type or embodiment of the invention se lected for illustration discloses merely a gear adapted ,to be vertically shifted into engagement with racks in the same vertical plane, the principles of the invention may be ftltllQtl out in other ways.

A printing or impression cylinder is indicated at 2, said cylinder being driven in any preferred manner (Fig. 3) bya gear 3 at one end thereof. meshing with a gear 4 upon a reversing shaft 5, mounted in suitable bearings (i-G in the frame-work of the machine. said frame-work supporting therein tracks or ways 7, 8 and 9, preferably having sets of rollers 10, 11 and 12, receiving the bed 1.

The lower face of the bed-plate 1 is provided (Figs. 1 and 3) with an upper rack ltl and a lowcrrack 1 herein shown as facing each other and adapted to receive between them a pinion 1.3, said lower rack being positioned above the re\ ersing shaft 5. Since in the present type of the invention said racks are shown as stationary and the relative movement lJQtWGtll the pinion and racks is obtained by a shifting movement of said pinion, herein shown as a vertical shifting movement, said pinion 15 is so mounted as to be brought alternately into working relation with the upper and lower racks.

Heretofore, so far as we are aware, in that type of press wherein racks are empliiycd, the teeth whereof substantially face each other, the lower rack has been arranged below the reversin gear, so that said rack engages said g ar at the lower edge of the gear. Such a construction is objectionable in that the weight of the press is largely increased by the length of parts required to support the lower rack beneath the rovers ing gear, and furthermore, a compactness of structure, such as is procured according to our invention, cannot be secured, such former types of presses being necessarily high framed. By supporting both racks above the reversing shaft, it is possible not only to greatly diminish the vertical lengthof its parts required for the support of the lower rack, but the supports may be more lightly constructed, while still securing a firm and eliective positioning for the parts.

Since in the present type of the invention the lower rack is located above the reversing shaft, and since in such type of the invention said racks are arranged with their teeth facing each other, said racks are not engaged by a gear directly mounted upon the reversing shaft, but by any preferred form or type of mechanism, preferably receiving motion from said reversing shaft. \Vhile such mechanism may be of any desired type, in the present instance the reversing shaft is shown as provided with a bed reciprocating gear 16, to which motion ma be imparted in any desired manner, (Figs. 1 and 2) as by a pinion 17 upon a driving shaft 18. suitably supported in the frame-work of the machine, Preferably mounted upon the reversing snaft 5 or concentric therewith, and as herein shown upon the hub of gear 16, is a bell-crank lever 19. the upper arm 20 whereof carries the pinion 15, which in the present type of the invent on is shown as meshing with the Qjear 16 to receive a continuous movement of rotation, it being herein shown as shifted from one rack to the other by movement of the bell-crank lever 19, for which purpose the lower arm 21 may be provided with a roll 22, engaging a cam track 23 inone face of a cam 21, mounted upon a shaft 25 suitably l the machine (Fig. l) are stationary resupp'orted in the frame-work of the inachine. said shaft bein driven in any desired manner, at the proper speed. It is of course apparent that any suitable type of mechanism may be employed to' shift the said pinion 15, provided the relative movement between the pinion and the racks be obtained by a movement of the pinion. The said pinion 15 is preferably so mounted upon the arm 20 of the bell-crank lever 19 as to be constantly maintained in meshing engagementwith the gear 16. and thus to be at all times rotated thereby, it rolling thereon when shifted from one rack to the ther, and beingsufiiciently wide, as indicated in Fig. 2, simultaneously to engage both the gear 16 and one or the other of said racks. Since said pinion 15 is, in the present type of the invention, at all times 111 mesh with the gear 16, there is no possibility of failure of said pinion accurately to mesh with each rack when shifted for enflae'ement therewith.

Duringthe engagement ofthe pinion 15 with either rack. the bed of the press is driven at a uniform speedin one direction or the other. In thepresent type of the invention the parts are so proportioned as that one rotation ofbed reciprocating gear 16, and consequently four rotations of pinion 15 occur during the period of the engagement with said pinion 15 with either rack. As tl:e bed nears its limit of movement in either direction. mechanism is brought into.

play to control the movement of the bed during theshifting ofpinion 15 from one rack to the other, such mechanism preferably being such to receive the bed at its full speed of movement. gradually to diminish such rate of speed until the bed is brought to a stop and then to drive the bed in the opposite direction at a gradually in creasing speed until the working speed of the bed is reached, at which time the bed is again brought under the control of pinion 15.

'hile any suitable mechanism may be employed to control the bed during the shifting of the pinion 1-"). we have in the present type of the invention indicated for that purpose (Figs. 1 and 2) reversing gears 26 and '27 mounted respectively in the outer forked ends of arms 28 and 29. which outer ends therefore provide movable fulcra for said gears. the inner ends or said'arms be ing forked as indicated a 30 and 31, to constitute straps suitably connected to yoltes .30 and 31' mounted as shown upon eccentrics 32 and 33 herein shown as mounted upon the 1( VQISlll-Q shaft 5. upon either side of a short bed reversing rack 34, with which the reversing gears 26 and 27 are adapted to be brought alternately into engagement. Suitablysupported in the frame-work of eccentric connection with the reversing shaft 'reversing rack 36 and the gear 27.

versing racks 35 and 36. upon which said reversing gears 26 and 27 are constantly reciprocated during the operation of the press through the described eccentric con nections.

The reversing shaft 5 in the present type of theinvention carries the primary reversing element or elements shown in the present embodiment of the invention to be the eccentrics 32, 32. It is course apparent that other types or embodiments of reversing elements may be employed and carried by said reversing shaft and we are in no sense to be limited to the particular type and embodiment shown and described.

Considering the type of mechanism shown, as the bed 1 nears its limit of travel to the right. the bed reversing rack 34' is brought into engagement with the reversing gear 2b, at which time the shifting'movement of pinion 15 commences, the said gear 26 being rotated because of its meshing engagement with the frame reversing rack 35 and the 9O 5, the eccentric connection being such that under the control of said gear 20, the movement to the right of said bed is gradually reduced to zero, and then gradually aug: mented in an opposite direction until the full working speed of the bed has been secured, at which time the pinion 15 has been brought into meshing relation with the other bed rack. the bed then passing from the control of gear 26 to the control of pinion 15. As the bed nears the end of its move ment in the opposite direction, a similar operation occurs through the instrumentality of the bed reversing raclt '3-1, the frame With the proportion of parts herein indicated one'half rotation of gear 16 occurs during each reversing movement of the bed. It is apparent. however, that the proportioning and timing of the various parts may be varied as desired. 'hile the extent of the shifting;- mo\ cment of gear 15 may be varied as desired, in the present type of the invention itmay be noted that a movement of pinion 1.5 equaling one pitch thereof is su'tlitient to carry the same from engagement w th one rack to eng c'ement with the otler.

Having thus described one type or einbodiment of the invention, it is to beunderstood that although the mechanism illustrated has. been: specifically referred to, descriptive terms are employed, not in their subordinate. but in their general sense and for descriptive purposes merely, and that the scope of the invention is set forth in the following claims:

' Ve claim- 1. A printing press having a r'eciprocable bed carrying opposed racks, a reversingiao shaft located below said racks, a bed recip ring inion 0 positely to said re'versihg shaft, pinion shifting mech- .ing relation to 'sai bed carry of and stationary rocating gear carried by said reversing shaft,

inion meshing with said bed reciproeating gear, and -rotary movement imparting means whereby engagement is effected in alternation between"said racks and said pinion.

' 2- A bed'carrying opposed racks, a reversing shaft located below saidracks havin thereon a' primhry reversing element an a rack driving pinion oppositely rotated with respect to saidreversing sha volving mechanism to l'QllSflld pinion from engagement with one rack to engagement with an0ther\.

3. A printing press bed, carryin opposed racks, a reversing. shaft locate belowsaid racks, a rack driw rotated with respect.

anisin toshift said pinion from en agement with onerack 'tOl engagement wit another, and eccentrically actuated reversing gears" act-uated from said reversing shaft and adapted alternatel to be brought. into driv ment thereof at the end of each stroke thereof and means other than said reversing shaft to rotate said gears.

4; A printing press having a reciprocable i'n opposed racks, a reversing haft located. below pinion oppositel rotated w th respect to'isaid reversingsha t, pinion shitting mechanism to shift'said pinion from engagement with one rack to engagement with another and .eccentrically actuated reversing gears hctuated from, said reversingshaft and adapted alternately .to be brought into dr1v ing relation to said bed to reverse the move ment thereof atthe end of each stroke there- ?1, A printing press having a reciprocable bed carrying opposed racks, a reversing shaft located below said racksga rack driving inion oppositely rota ed with respect to gaidreversin shaft, pinion shifting mechanism ,to shi t said .pinionfrom engagement .with one,'rack, to engagement with another and cocentrically-actuated reversing gears actuated from said reversing shaft and adapted alternately to be brought into drivingrelatioh to said bed to reverse the movement thereof at the end of each str oke thereof, said gearseach having a movable fulcram. g

' 6. Aprinting press-havinga reciprocable opposed racks, 'a reversing shaft'locate below saidiracks, a rack driving pinion oppositely rotated with respect to said reversing shaft. ipinionshifting mechanism to shift said pinion from engagement with one rack to engagement with another,

reversing gears, arms printing press having a reciprocable ft, and pinion re-w havihg a reciprocablebed to i'everse the movej said racks, a rank drivmeans to rotate said gears.

. reci' rocating'ge'ar carried by said reversing slia t, a pinion meshing with said bed tociprocating gear, and pinion'elevating and depressing mechanism to shift said inion into engagement with said racks in al iernation; 3

printing press having a reciprocable bed carrying opposed racks, a reversing shaft located below said racks liavin thereon a primary revers ng element, a d reciprocating gear carried by said reversing shaft, a pinion meshing with said bed -reciprocating gear and adapted by rolling engagement with said bed reciprocating glizri' to be brought into engagement with rlltl racksiii alternation, and mechanism to in part said rolling movement.

9. A printing press having a reciprocable bed carrying opposed racks, a reversing shaft located below' said racks-having thereon a ,primary" reversing I element, a rack riving pinion adapted to belbroiiglit into engagement with said racks in alternation by movement of revolution about a center aiidrotation upon its axis, and means to ini'- part said. described movements of revolution and rotation.

10. A printing PIQSS lI HVlXIg a reciprocable bed carrying opposed, racks, a reversing shaftbelowsa-id racks and havip thereon a primary reversi'n eleme t, a racli driving pinion a apted to e brought into eiigage ment with said racks in alternation by movement of revolution aboiit a center and rota .tion upon' itsaxis and means intermediate said reversing shaft and said pinion to impart said described movements of revolution and rotation.

V 11. A printin'g press having a reciprocable bed. carrying opposed racks, a reversing shaft located below said racks and having thereon a primary reversing' element, a me driving pinion rotated by said reversing sliaft,.and means to shift said pinion from engagement with one rack to engagement with an opposed rock by a rolling movement. of said pinion.

: 12. A printing press having a reciprocable' bed-carrying opposed racks, a, reversing sha'ft located below said racks and bovin thereon a primaryreversingjelement, a rac driving pinion rotated by said reversing shaft and mounted for swinging movement thc'reon and means to swing said pinion from engagement with one rack to engagement with mounteduponsaid reanopposed rack.

13. A printing press having a reciprocable bed carrying opposed racks, a reversing shaft located below said racks and having thereon a rimary reversing element, a lever concur trio with the reversing shaft, a rack driving pinion carried by said lever, and a tuating means for said lever whereby said pinion is shifted from engagement with one rack to engagement with an opposed rack.

14!. A printing press having a reciprocable bed carryiny opposed racks, a reversing shaft located below said racks and having a primary reveising element, a bell crank lever concentric with said reversing shaft, a pinion carried by said bell crank lever and means to actuate said lever, thereby to move said. pinion from engagement with one rack to engagement with an opposed rack.

15. A printing press having a reciprocable bed carrying opposed racks, a reversing shaft having thereon a primary reversing element, a lever concentric with said reversing shaft, a pinion carried by said lever ,and cam mechanism in engagement with said lever and ada ted to swing the same to shift said pinion rom engagement with one rack to engagement with an opposed rack.

16.13 printing press having a reciprooable bed carrying opposed racks, a reversing shaft located below said racks and having thereon a. primary reversing element, and a bed reciprocating gear carried thereby, a lever mounted on said reversing shaft, a pinion carried by said lever and in mesh with said bed reciprocating ear, and lever actuating mechanism to shi it, said pinion from engagement with one rack to engagement with an opposed. rack.

17. A printing press having a reciprocable bed carr ing opposed racks, a reversin shaft located elow said racks and havin t iereon a rimary reversing element, a befreciprcn ea ing gear mounted upon said reversing shaffla bell crank lever concentric with said reversing shaft, a pinion carried by said lever and meshing with said bed reciprocating gear, and lever actuating mechanism to shift said pinion from engagement with one rack to engagement with an opposed rack.

18. A printing press having a reciproeable bed carrying opposed racks, a reversing shaft located below said racks and having thereon a primary reversing element, a bed recipro eating gear mounted upon said reversing shaft, a bell crank lever concentrlc with said reversing shaft, a pinion carried by said lever and meshing with said bed reciprocating gear, and cam mechanism operating said lever, thereby to shift said pinion from engagement with one rack to engagement with an opposed rack.

19. A printing press having a reciprocable bed carrying a plurality of racks, a reversing shaft located below said racks and hava rack driv ing pinion having a movement of revolution with respect to said shaft and of rotation upon its axis, uhd mechanism to impart said described movements to said pinion thereby to shift the same from one rack to another to drive said racks in alternation.

20. A printing )ress having a reciprocable bed carrying a furality of racks, a reversing shaft locate below said racks and having. thereon a primary reversing element, a rack driving pinion rotated by said reversing shaft, and having means to revolve said pin ion, thereby to roll said pinion from en agement with one rack to engagement wi 1 another.

21. A printing press having a reciprocable bed carrying a plurality of racks, a reversing shaft located below said racks, and having thereon a primary reversing element, a bed reciprocating gen r carried by said reversing shaft, a pinion rotated by said bed reci roeating gear and pinion revolving mee anism acting thereby to roll said pinion from engagement with one rack to engagement with another.

22. A printin press having a reciprocablc bed carrying a p urality of racks, a reversing shaft located below said racks and havin thereon a primary reversing element, a rac driving inion rotated by said reversing shaft, an means to shift said pinion from engagement with one rack to engagement with another rack by'a rolling movement of said pinion.

23. A printing press having a reciprocable bed carrying a p 'urality of racks, a reversing shaft located below said racks and having thereon a primary reversing element, a

rack driving pinion rotated by said reversing shaft, and means to move said pinion in an are about a predetermined center from engagement with one rack to engagement with another rack and a gear upon said reversing shaft, the axis of said gear corresponding to the center of the said arc.

24. A printing press having a reciprocable bed carrying a plurality of racks, a reversing shaft located below said racks and having thereona primary reversing element, and

a rack driving pinion rotated by said reversing shaft, and means to move said pinion in an are about said reversing shaft as a center from engagement with one rack to engagement with another rack.

25. A printing press having a reciproca ble bed carrying a plurality of racks, a reversing shaft located below said racks, a rack driving pinion actuated from said reversing shaft, relative movement imparting devices to ca use engagement of said rack driving pinion and said racks in alternation,and reversing gears operatively connected to said reversing shaft and adapted alternately to be brought into i y 5 i iug'thereona prnnary reversing element, and 3 driv ng relation to said bed to reverse the movement thereof at the end of each stroke each o said reversing gears having a movabf; vtplcrum. a

6J1 printing press having a reciprocablebed carrying a plurality of racks, a reversing shaft located below said racks, a rack driving pinion actuated from said reversing shaft, relative movement imparting devices to cause engagement of'said-rack driving pinion and said racks inalternation and reversing gears having speed diminishing and accelerating GQIIDBCUODS with said. reversing shaft and said racksin alternation, and reversing ears having eccentric connections with sai re-- ersin shaft and adapted. alternatelyto b'eor'oug t irit'odri'ving relation tO-zSfliCl beddio reverse the movement thereof at the end of each stroke andfraclrs to rotatc s'aid reversing gears.

driving pinion ,andsai 'bed carryin a plnralit shaft locate below sai recline-rack driving 28, A printing press having a reciprocabie of racks, a reversing ctuated from said reversing shaft, relative ovement imparting devices to can'sel gagement hf saidrack driving. pinionhnd id racks in alternirtiorn-and reversing gears each having a double yoke, and eccdntrnc coranection to-said'reversing shaft andadapted; alternately to be broughti-into drivingt ela- 'tionto said bed. to reversethe nioyeme nt ereof at the end of each stroke.

2'9. 11 printing press having a reciprocable bed carrying a plurality ojopposed-racks, a reversing shaft located below said racks,'a rack driving pinion actuated frorn said revet-sing shaft, relative movement impartin devices to "cause engagemeneof said l ac driving pinion and sai 'racks in 'tlli'QIIiiltlOIl, and reversing gears operatlvely connected to said reversing shaft and adapted alternately to be brought into driving relation to said bed to re'verse the movement-thereof at the end of each stro'ke saidgears being bodily movable. I p

- 30. A printing press having a reci'procable bed carrying a pluraht of opposed racks, a reversing s ft-locat below said racks, a rack drivin pinion actuated frorn said reversing shift, relative movement -mpartin devices to cause enga 'ement of sa drac racks inaltern tion and reversin gea'rs'having' sp'eed diminishing and acceratin connections with said reversing-shaft an adapted alternately to pinion rack drivingpinionactuated r am said bed carrfy'iinsf opposed gea r,

be brought into drivin relation to said bed to reverse the movemen i thereof at the end of each stroke said gears beingbodily movable.

31. A printing press hav ng a reciprocable bed carrying a plurality of opposed racks, a reversing shaft loeated'below said racks; a rack driving pinion actuated'from sz'iidreversin shaft,-relative movement impartin devlees l0 cause'engageinent OfY SHIdQIaC driving pinion and said-racks in alternation, and reversin gears having epcenftrio connections wi said reversing shaft. and adapted alternately to be" brought into driving relation to saidb'ed'to reverse the movie- 'inent there i at the end of eacli sltroke, and" lnovab-lh'nie nbers inounted upbn said revers-g ingqshaih, said gears being-pivotally mounted upon'said members and moving therewith.

' B2; A printing press having a reciprocable b d carrying a. plurality of opposed racks, a re 'e'rsing shaft located below said nadks? a eversing shaft, shifting mechanism to shift said pinion from engagement lwith .one raclr toenga'gement with anoppose'd rack androversing. gears'adapted alternately to be brought into driving'relation'ito said bed: to reverse the movement: thereof at the end of 'eachstroke, and niov ble members mounted u on said revbrsihg' s1aft,=-said gears beingl "pivotally' mounted uponsaid members an inqvin therewith.

33. I printing press havin a reciprocae ng vbed'carryiin o' posed rac jlzs, a reversing shaft locaiedbe ow said racks, a'ra'ck driving, jpinion pctuatetl from said reversing. sipxit, inion shifting meansto shift sai ini'on'into enga erhent wit o osed racks. lIi alternation an .bod'ily m able reversin pinions operativelylconnected to said sha and adapted alternatelyjtp be brought into driving-relation to said bed to-reverse-tie' inovementthereof at the end of each-stroke.

3'4. A rinting press hav ng a IQGIPIOCfi bI B o posed racks, a reversing shaft c'ate" be ow said 'raek's, carrying a bed reciprocating 'ge ar, ,a' rack riving [pinion in meshwith said bedreciprocatin gear, 'pinion shiftiiny'rniechanisrn to slii t said pinion into a ternate engagement. with racks, and bodil 1 movable reversing pinions operatively connected tonsaid shaft and adapted alternately to he brought into driving relation tosaid bed to reverse the lmovenienb thereof at the end of each stroke.

35. A printing press having a reoiprocable bed carrying o-posed racks, a reversing shat'tlocate e ow said'rac'kacarr inga;

bed reciprocating. gear, a rack ri-v ng' pinion in mesh vvith saidrbed "reeiprocat n mion shifting meehanis nj t'o sin and reversin gears eccenalternately to be brou ht into drivingrela- I gears operatively connected to said revers tion to-said bed to reverse the movement thereof at the end of each stroke each of said F brought, into driving relation to said bed reverse the movement thereof atthe end of gears being mounted upon a movable ful- 'orum.

36 A printing press comprising an impression cylinder having a gear, a reciprocable bed carrying a plurality of opposed racks, a reversingvshaft having thereon ,a primary reversing element and parrying a gear in mesh with said impression cylinder gear, a bed reciprocating gear carried by said reversing shaft, a rack driving pinion rotated by said bed reciprocating gear, and

pinion shifting mechanism, to shift 'saidi pinion into alternate engagement with said opposed racks. i

3?. A printing press comprising an impression cylinder having a gear, 'a reciprocable bed carrying a plurality of opposed racks, a reversing shaft below said racks and having a gear in mesh with said impression cylinder gear, a bed reciprocating gear upon said reversing shafh a rack driving pinion in mesh with said bed'reciprocating gear,

and pinion shifting mechanism to shift" said pinion into alternate engagement with o)- )OSGLl racks while maintaining it in mesh with said bed reciprocating gear.

3S. A printing..' rss 'oompri 'ng an imhaving a, gear, arecipracks, a reversing shaft having a gear in mesh with said impression cylinder gear, a bed reciprocating gear upon said reversing shaft, a rack driving pinion in mesh with said bed reciprocating gear, and pinion shifting mechan sm to shift said pinion int) alternate engagement with opposed racks while maintaining it lI11118Sl1 with said bed reciprocating gear. a

39. A printing press having a reciprocable bed carrying opposed racks, a reversing shaft located below said racks, a bed reciprocatin'g gear carried by said sha'ft, a rack driving pinion in mesh with said bed reciprocating gear, pinion shifting mechanism to shift said pinion into alternate engagement with opposed racks, eccentri s mounted-upon said reversing shaft and reversing gears operatively connected to said eccentrics and adapted alternately to be brought into driving relation to said. bed to reverse the movement thereof at the end of each stroke. v

40. A printing press having a reciprocable bed carrying opposed racks, a reversing shaft located below said racks, a bed rcciprocating' gear upon said shaft, 21 rack driving pinion 111 mesh with said bed reci'procating' gear, shifting mechanism to shift said pinion into alternatcengagement with opposed racks while maintaining the same in mesh with said gear, eccentrics upon said reversing shaft. and reversing ing shaft and adapted alternately to be to each stroke. i

' 41. Aprinting press having a rcciprocablc bed -carrying opposed acksa a reversing shaft located below said racks, a rack riving pinion actuated fronr said reversing shaft,- pinion shifting mechanism to shift said pinion into alternate engagement with opposed racks. a bed reversing rack carried by the bed, a plurality of stationaryrevels ing racks, and reversing gears operativcl'y connected with said reversing shaft and in engagement with said stationary racks respectively and adapted alternately to be broughtinto. engagement with said bed weversing rack thereby to reverse the move ment of said bed at the'end of each stroke bed, a pair of stationary reversing racks a pair of reversing gears in meshwith said stationary racks respectively and drivin connections therefrom to said reversing shaft whereby when said gears are brought into engagement with said bed reversing rack :at the end of" opposite strokes the movement of the bed is reversed.

- Aprinting press comprising an impression cylinderhaving a gear, a reciprocabie bed carrying a plurality of racks.a reversing shaft having a gear ,thereon in mesh with said impression cylinder gear. a bed reciprocating gear, aracl'c driving pinion actuated by said gear, pinion shifting mechanism to shift said pinion into alternate engagement with said racks, and reversing gears operatively, connected to said shaft, a rack driving pinion actuated by" said bed reciprocating gear; pinion shifting mechanism to shift said pinion into alternate engagement with said racks, reversing gears having eccentric connections with said reversing shaft-and adapted alternately to be brought into driving relation to said bed to reverse the movement thereof at the end of each stroke.

45. A printing press having a reciprocable bed carrying a plurality of opposed racks, a reversing shaft locatedbelow said racks and carrying a bed reciprocating gear, a lever concentric with .said reversing shaft, a rack driving pinion mounted upon said lever and in mesh with said bed reciprocating gear,

lever actuating means to shift said pinion into alternate engagement with said racks, reversing gears operatively connected to said reversing shaft and adapted alternately to be brought into driving relation to said bed to reverse the movement thereof at the end of each stroke. H

46. A printing press having a reciprocable bed carrying-a plurality of opposed racks, a reversing shaft located below said racks and carrying a'bed reciprocating gear, a lever concentric with said 'reversing'shaft, a rack driving pinion mounted upon said lever and in mesh with said bed-reciprocating gear, lever actuating meanssto shift said pinion into alternate engagement with said racks, reversing gears eccentrically connected to said reversmg shaft and adapted alternately to be brought into driving relation to said bed to reverse the movement thereof at the end of each stroke. v r y 47. A printing press having a recipfocable bed carrying opposed racks, a reversing sha'ft located below said racks and carrying a bed reci rocatin ear a lever mounted uaon,

. P b b said-reversing shaft, a rack driving pinion concentric Wltll' said lever and rotated by said bed reciprocating gear,cam mechanism ion mounted upon said lever and rotated by said bed reciprocating gear, cam mechanism to operate said lever thereby to shift said pinion into alternate engagement .with said racks, and reversing gears eccentricall connected to said-reversin shaft and-a apted alternate-1y to be broug t into driving rela: tion to said bed to reverse the movement thereof at the end of each stroke.

49. A printing press having a reciprocable bed carrying opposed racks, a reversing shaft located below said racks and carrying a bed reciprocating gear, a lever concentric with said reversing shaft, '21 rack drivm inion mounted upon said lever and rotated y said bed reciprocating gear, cam mechanof each stroke.

ism to operate said lever thereby to shift. said pinion into alternate engagement with said racks, a bed-reversing rack carried by,

reversin racks and reversing gearsin mes respective stationary reversing racks, oper atively connected to said reversing shaft and adapted a ternately to be brought into engagement with said bed reversing rack thereby to reverse the movement of said bed at the end of each stroke thereof.

50. A printing press comprising an impression cylinder having a gear, a recipro-v cable bed carrying a plurality of opposed racks, a, reversing shaft having thereon a primary reversing element and located below said racks and carrying a gear 111 mesh with said impression cylinder gear, a bed reciprocating gear carried by said reversin shaft. a rack driving pinion rotated by sai bed reciprocating gear, and pinion shifting mechanism to shiftsaid pinion into alternate engagement with said opposed racks.

51. A printing press comprising. an impression cylinder havin a ear, a reciprocable bed carrying a p lllflfity of opposed racks, a reversing shaft below said racks and having a gear in mesh with said impression cylinder gear, a bed reciprocating gear upon said reversing shaft, arack driving pinion in mesh with said bed reciprocatin geafi pinion shifting mechanism to shi said pinion into alternate engagement with said opposed racks while maintaining it in mesh with said bed reciprocating gear, and reversing means operatively connected to said reversing shaftv and adapted alternately to" be brought into driving relation to said bed to reverse the movement thereof at'the end 52. A printing press comprising an impression cylinder havin a ear, a' reciprocable bed carrying a p ura ity of opposed racks, a reversing shaft havin a gear in mesh with said impression cy inder gear, a, bed reciprocating gear uponsaid reversing shaft, a rack driving pinion in mesh with said bed reciprocating ear, pinion shifting'mechanism to shift s'ai inion into alternate engagement with Ysai 'opposed racks while maintainingit' in mesh with said d reciprocating gear, .and reversing gears mg shaft and adapted alternately to, be brought into driving relation to said bed to reverse the movement thereof at the end of each stroke.

I 53.1 A printing press comprising an im-' pre'ssion cylinderphaving 0; ar, a. reciprocable bed carrying up ura ity of opposed racks, a reversing shaftbelow said rack's'and. havin again in mesh ,with said-impression cylind er gear, a'bed'reciproeati'nggenr ppon said reversing she a rack' driving pin on in mesh, with said. reciprocating dgenr,

ini-on shifting mechanism to sh ft sat p ion into alternate engagement with opposed operatively conl'iected to said roverscable bed carrying a plura racks while maintaining it in mesh with said bed reciprocating gear, and reversing gears crrentrically connected to said reversing shaft and adapted alternately to be brought into driving relation to said bed to reverse the movement thereof at the end of each stroke.

54. A printing press conu n'ising an impression cylinder having a gear, a reciprocable b'ed carrying a lurality of opposed racks, a reversing sha t having a gear in mesh with said impression cylinder gear, a bed reciprocating gear upon said reversing shaft, a rack driving pinion in mesh with said bed reciprocating gear, pinion shifting mechanism to shift said pinion into alternate engagement with opposed racks while maintaining it in mesh with said bed reciprocatinggear, and reversing gears eccentrically connected to said reversing shaft and adapted alternatel' to be brought into driving relation to said bed to reverse the movement thereof at the end of each stroke.

55. A printing press comprising an impression cylinder having a gear, a reciprocable bed carrying a plurality of opposed racks, a reversing shaft below said racks and having a gear in mesh with said impression cylinder gear, a bed reciprocating gear upon said reversing shaft, a rack driving pinion in mesh, with said bed reciprocating gear, pinion shifting mechanism to shift said pinion into alternate engagement with opposed racks while maintaining it in mesh with said bed reciprocating gear, eccentrics mounted upon said reversing shaft, and reversing gears actuated by said eccentrics and adapted to be brought into driving relation to said bed to reverse the movement thereof at the end of each stroke.

56. A printing press comprising an impression ity of opposed racks, a reversing shaft having a gear in mesh with said impression cylinder gear, a bed reeiprocatin gear upon said reversing shaft, a me drivingpinion in mesh with said bed reciprocating gear, pinion shifting mechanism to shi is said pinion into alternate engagement racks While maintaining it in mesh with said bed reciprocating gear, eccentrics mounted upon said reversing shaft, and reversing gears actuated by said eccentrics and adapted to be brought into driving relation to said had to reverse the end of each stroke.

57. A ,printing press comprising an impression cylinder having a ear, a reciprocable bed carrying a plura ity of opppsed racks, a reversing shaft below said racks and having a gear in mesh with said impression cylinder gear, a bed reciprocating gear upon said reversing shaft, a rack drivmg pinion in mesh with said had reciprocylinder having a gear, a recipro-.

with opposed movement thereof at-the trics mounted upon said reversing shaft, and

reversing gears operatively connected to said eccentrics, in mesh with said stationary revcrsing racks respectively, and adapted to be brought alternately into engagement with said bed reversing racks thereby to reverse the movement of the bed at the end of each stroke thereof.

A printing press comprising an imprcssion cylinder having a gear, a re'ciprocable bed carrying a plurality of opposed racks. a rmersing shaft having a gear in mesh with said impression cylinder gearqa bed reciprocating gear upon said reversin shaft, a rack driving pinion in mesh wit] said bed reciprocating gear, pinion shifting mechanism to shift said pinion into-alternate engagement with opposed racks while maintaining it in mesh with said reciproeating gear, a bed reversing-rack carried by said bed, a plurality of stationary reversing racks, eccentrics'mounted upon said reversing shaft, and reversing gears operatively connected to said eccentrics, in mesh with said stationary reversing racks respectively. and adapted to be brought alternately into engagement with said bed reversing racks thereby to reverse the movement of the bed at the end of each stroke thereof.

59. A printing press having a reciprocable bed carrying opposedracks, a reversing shaft located below said racks, a bed re- Clpl'mmiing gear carried by said reversin shaft, a ciprocating gear, depressing mechanism to shift into engagement with said racks t1on.'

60. A printing press having a reciprocable bed carrying opposed racks, a reversing shaft located below such racks, a rack driving pinion oppositely rotated with respect to said reversing shaft, relative movement imparting means to impart relative movement to said rack driving pinion and said racks, reversing gears adapted alternatel said ed to reverse the movement thereof at the end of each stroke thereof, each of said gears having a movable fulcrum.

61. it printingpress having a reciprocable bed carrying opposed racks, a reversing shaft located below said racks, a rack drivpimon ,Ineshi'ng vvithsaid bed r and pinion elevating and said pinion in alternamg pinion oppositely rotated with respect to Ffllti reversing shaft, relative movement imparting means to impartrelative move: ment to said rack driving pinion and said racks. reversing gears adapted alternately to be brought into driving relation to said to be brought into driving relation to depress sai bed to reverse the movement thereof at the end of each strokethereof, and rack mechanism to rotate saidv gears.

62. A printing press having a reciprocable bed carryin opposed racks, a reversing shaft locate below said racks, an impression cylinder having a gear thereon, said reversing shaft carryin a gear in mesh with the gear of the sai der, a primary reversing member upon said reversin shaft, a bed reciprocating gear upon said reversing shaft between sald primary reversing member and said gear in mesh with the lmpression cylinder gear, and a rack driving gear driven from said bed reciprocating gear and means relatively to shift said opposed racks and said gear thereby to bring alternate racks into engagement with said ear.

63. A printing press having a reciprocable bed carrying opposed racks, a reversing shaft located below said racks, an impression cylinder having. a gear thereon, said reversing shaft carrying a, gear in mesh with the gear of the said impression cylinder, a priinary reversing member upon said reversing shaft, a bed reciprocating gear upon sa 1d reversing shaft between said primary reversing member and said gear in mesh with the impression cylinder gear, a rack driving pinion meshing with said bed reciprocating gear, and means to'impartrelative movement to said pinion and said racks whereb the racks may be engaged with said imon alternately.

64. A prlnting press having a reciprocable bed carryin o posed racks, a reversing shaft locate belbw said racks, an impression cylinder having a gear thereon, said reverslng shaft carrying a gear in mesh with the gear of the said impression cylinder, a primary reversing member upon said reversin shaft, 8. bed reciprocating gear upon said reversing shaft between said primary reversing member and sand gear in mesh with the impression cylinder gear, a rack driving pinion driven from said bed reciprocating gear, and means to shift sa d pinion into alternate engagement wlth said racks.

65. A printing press having a reciprocable bed carrying opposed racks, a reversing shaft located below said racks, an impression cylinder having a gear thereon, said reversing shaft carrying a gear in mesh with the gear of the said impression cylinder, a primary reversing member upon said reversing :=,li.aft. a bed reciprocatin gear upon said reversing shaft between said primary reversing member and said gear in.

mesh with the impression cylinder gear, a rack driving pinion meshing with said bed reciprocatin gear. and means to elevate and d pinion thereby to bring 11;

impression c'ylinrespect to sai reversin posed rack by a rollln into alternate engagement with said opposed racks.

66. A printing press having a reciprocable bed carrying opposed racks, a reversing shaft located below said racks, a bed reciprocating gear carried by said reversing shaft, a pinion meshing with said bed reciprocating gear, and rotary movement imparting means, whereby, while retaining said pinion in mesh with said gear, engagement is effected in alternation between said racks and said pinion.

67. A printing press having a reciprocable bed carrying opposed racks, a reversing shaft located below said racks and carrying a primary reversing element, a bed reciprocating gear carried by said reversing shaft, a rack driving inion oppositely rotated with shaft and meshing with said bed reciprocating gear, and pinion revolving mechanism to revolve said pinion from engagement with one rack to engagement with another while retaining it in mesh with said bed reciprocating gear.

'a. rimar reversin element a'racli driving pinion rotated by said reversing shaft, and ineans'to shift said pinion from engagement with one rack to engagement with an opmovement of said pinion, said pinion shifting means acting directly through said pinion to roll the same.

69. A printing press having a reciprocab'le bed carryin a plurality of racks, a reversing shaft locate below said racks and havinga primary reversing element, a bed. reci rocatmg gear carried by said reversing s aft, a rack driving pinion meshing with said bed reciprocatin gear, and means to revolve said pinion t iereby to shift said pinion om engagement with one rack to engagement with another.

70. A printing press having a reciprocable bed carrying a plurality of racks, a reversing shaft located below said racks and having a primary reversing ,element, a bed reci meeting gear carried by said reversin s aft, a pinion meshing with said bed reciprocating gear, and pinion revolving mechanism acting thereby to shift said pinion from engagement with one rack to engagement with another.

71. A printing press having a reciprocable bedfcarrying a plurality of racks, a reversing shaft located below said racks and havin thereon a primary reversing element, a be reciprocating gear carried by said reversing shaft, a rack driving pinion'meshing with said bedreciprocating gear, and means to shift said pimon from engagement with one rack to engagement with another. rack by a rolling movement of the pinion.

' bed carrying a plurality of racks, a reversing shaft located below said racks and havin thereon, a primary reversing element, a bed reel rocatm gear carried by said reversing sha t, a rac driving pinion meshing with said gear, and means to move said pinion in an are about a predetermined center from engagement with one rack to engagement with another rack.

73, A printing press having a reciprocable bed carrying a plurality of racks, a reversing sh ft located below said racks and havin thereon a primary reversing element, a' be reci rocatin gear carried by said reversinv shat, a no driving pinion meshing witi said gear, and means to shift said pinion from engagement with one rack to engagement with another rack by a rolling movement of the inion, while maintaining the pinion in mes with said gear.

74. A printing press having areciprocable bed carrying a plurality of racks, a reversing shaft located below said racks and havin thereon a primary reversing element, a bed reci rocatin gear carried by said reversing sha a rac driving pinion meshing with said gear, and means torevolve said pinion, thereby to shift said pinion from engagement with one rack to. engagement with another while maintaining it 1n mesh with said gear 7 5. A printing press having a rcciprocable bed carrying aplurality of racks, a reversing shaft located below said racks and having thereon a rimary reversing element, a rack driving pinion rotated by said reversing shaft and having means to revolve said 'iinion, thereby to shift said pinion from engagement with-one rack to enga ement with another rack, said pinion revo ving means acting directly through said pinion to shift the same.

76.. Aprinting press having a reciprocable bed carrying a plurality of racks, a reversing shaft located below said racks and having thereon a primary reversing element, a. rac r driving lnion rotated by said reversing shaft, an means to move said pinion in an are about said reversing shaft as a center from engagement with one rack to engagement with another rack.

77'. A printing press having a reciprocable lied carrying opposed racks, a reversing shaft, an impression cylinder havmg a gear thereon, said reversing shaft carrying a gear in mesh with the gear of the said im'- )ression cylinder, :1 primary reversing member upon said reversing shaft, a bed reciprocating gear upon said reversing shaft between said primary reversing member and saidgear in mesh with the impression cylinder gear, a rack driving pinion meshing with said bed reciprocating gear, and means to impart. relative movementto said pinion and said racks, whereby the racks may be engaged with said pinion alternately.

78. A printing press having a reciproca his bed carrying opposed racks, a reversing shaft, an impressioncylinder having a gear thereon, said reversing shaft carrying a gear in mesh with the gear of the said impression cylinder, in primary reversing member upon said reversing shaft, a bedreciprocating gear upon said reversing shaft between said primary reversing member and said gear in mesh with the impression cylinder gear, a ra k driving pinion meshing with said bed reciprocating rear, and means to elevate and depress sald pinion thereby to bring it into alternate engagement with said opposed racks.

79. A printing press having a reciprocablo bed can ing opposed racks, a reversing shaft located elow said racks and having thereon a primary reversing element, a bell crank lever concentric with said reversing shaft, a pinion carried by said bell crank lever, and means to, actuate said lever thereby to swing said pinion from engagement with one rack to engagement with an opposed rack.

80. A printing press having a reciprocablc bed carrying racks, a reversing shaft below said racks and having thereon a primary reversing element, a lever concentric with sald shaft, a pinion carried by said lever and means to actuate said lever, thereby to move said pinion from engagement with one rack to engagement with another opposed rack.

81. A printing press having a reciprocable bed carrying rack mechanism, a rotating shaft located below such rack mechanism and having thereon a primary reversing element, bearings wherein said shaft is maintained in fixed alinement, a rack drivin pinion, a gear on said shaft wherewith'sai pinion is in mesh, and means to move said pinion in an arc in a vertical plane, whereb said pinion is caused to mesh with said rac mechanism to drive the same.

82. A printing press having a reciprocable bed and one or morev racks opcratively con nected thereto, a rotating shaft, :1 gear mounted upon said shaft, a rack driving pinion meshing with said gear, an arm carrying said pinion, and means to move said pinion, so that the same periodically engage meshing with said gear upon said shaft eccentrics mounted upon said reversing shaft and reversing gears operatively connected to said eccentrics and adapted alternately to he brought into driving relation to said bed to shaft,a'pinion meshin with said gear whee a lever concentric wit said reversing shaft and carrying said pinion, and means for 0s cillating said lever to cause said pinion to mesh with the said rack to drive the same eccentrics 'inounted upon said reversing shaft and reversing gears operatively connected to saideccentrics and adapted alternately to be brought into driving relation to said bed to reverse the movement thereof at the end of each stroke.

Set. In a printing press comprising among its elements a bed and rack, a reversing shaft, a gear wheel upon said reversing shaft, a pinion meshing with said gear wheel, a lever concentric with the said reversing shaft and carrying said pinion, and.

means for oscillating said lever so as to reciprocate said pinion in a vertical plane eccentrics mounted upon said reversing shaft and reversing gears operatively connected to said eccentrics and adapted alternately to be brought into driving relation to said bed to reverse the movement thereof at the end of each stroke.

85. In a printing press comprising among its elements a bed, opposed racks facing each other, a rotating shaft below said racks and having thereon a primary reversing element,

a lever concentric with the said rotating shaft and carryin said pinion, and means for oscillating saicf lever soas to reciprocate said pinion in a vertical plane.

87. A printing press having a reciprocable bed carryin o posed racks, a reversing shaft located bel thereon a primary reversing element, a pinion, means carrying said piniona gear on said shaft wherewith said inion meshes, and mechanism to actuate said inion carrying means, thereby to swing sai pinion m engagement with one ra'ck to engagement with an opposed rack.

88. A printing press comprising an impression cylinder havinga gear, a reciprocable bed carrying a P am lty of opposed racks, a reversing shaft below said rac having a gear in mesh with said impression cylinder gear, a bed reciprocating gear iipon said reversing shaft, a rack driving pinion in mesh with said bed reciprocatin gear pinion shifting mechanism to shi sai pinion into alternate engagement with said opposed racks while maintaining it in mesh with said bed reciprocating gear, and reversing means operatively connected to said reversing shaft and adapted alternately to be brought into driving relation to said bed to reverse the movement thereof at the end of each stroke.

In testimony whereof, we have signed our names to this specification, in the presence of two subscribing witnesses.

WILLIS K. HODGMAN. BIGKNELL HALL.

Witnesses.

FREDERICK M. Arwooo, NOBLE W. ASHLEY.

ow said racks and. having s and 

